Cephalodiscus and Classification of Cephalodiscoidea: List of species and genera of recent and fossil cephalodiscid pterobranchs.
Cephalodiscus densus Andersson, 1907 (Hemichordata, Graptolithoidea).: Zooid and coenecium morphology of a cephalodiscid pterobranch from Terra Nova Bay, Ross Sea.
Cephalodiscus gracilis: Photos of a colony and individuals.
Cephalodiscus graptolitoides Dilly, 1993.: This species, a probable extant graptolite (according to some researchers), is regarded as a living fossil.
Cephalodiscus lutetianus (Graptolithoidea, Cephalodiscoidea): The only fossil species of the genus Cephalodiscus.
Class Pterobranchia: General information.
Classification of the Extant Hemichordata: List of species, genera and families.
Collagen in the pterobranch coenecium: Results of amino-acid analysis of the coenecium of Cephalodiscus and Rhabdopleura.
First Occurrence of Rhabdopleura in North America: First fossil representatives of Rhabdopleura (Graptolithoidea: Rhabdopleuroidea) in North America are reported.
Pterobranchia: Classification of the Rhabdopleuroidea: List of extinct and extant families, genera and species.
Rhabdopleura kozlowskii: Diagnosis, occurrence, images and references of the Jurassic species.
Rhabdopleura sp.: A colony of Rhabdopleura showing extended and contracted zooids.
SEM micrographs of Rhabdopleura compacta.: Three coenecia (two young) collected from Stoke Point, England, are illustrated.
The earliest known pterobranch hemichordate: Rhabdotubus johanssoni, described by S. Bengtson and A. Urbanek in 1986 from the early Middle Cambrian of Sweden, was recognized as the earliest known pterobranch hemichordate!
The oldest known Cephalodiscus-like hemichordate: Eocephalodiscus polonicus Kozlowski from the upper Tremadocian of Poland: pictures of the holotype, links.